Document Detail


Effects of bilateral resection of facial nerves on suckling in developing rats.
MedLine Citation:
PMID:  15168903     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of the present study is to investigate functional role of the facial nerve on suckling in developing rats. The bilateral resection of facial nerves on postnatal day 1 (P1) resulted in cell loss of facial motoneurons and complete facial paralysis without any whisker movement or nictitating reflex at the end of the postnatal 3 weeks. Although the body weight of the nerve-resected rats increased gradually for the postnatal 3 weeks, they weighed less than the control rats without nerve resection. The nerve-resected rats contained less milk (0.25 +/- 0.02 g) than the control rats (0.35 +/- 0.02 g) in the stomach on P17. On P21, the body weight of the nerve-resected rats (25.33 +/- 0.32 g) was decreased by 28% compared to that of the control rats (35.08 +/- 0.57 g). Although their growth was substantially more retarded than that of the control animals, most (92%) of the nerve-resected pups could survive without facial nerve innervation. The orofacial musculature innervated by the facial nerve plays an important role in breastfeeding, but the present study shows that these muscles are not essential for the survival of neonatal rats.
Authors:
N Fukushima; K Fujita; K Yokouchi; K Kawagishi; T Moriizumi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Brain research bulletin     Volume:  62     ISSN:  0361-9230     ISO Abbreviation:  Brain Res. Bull.     Publication Date:  2004 Feb 
Date Detail:
Created Date:  2004-05-31     Completed Date:  2004-07-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7605818     Medline TA:  Brain Res Bull     Country:  United States    
Other Details:
Languages:  eng     Pagination:  385-9     Citation Subset:  IM    
Affiliation:
Department of Anatomy, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Animals, Newborn
Animals, Suckling
Axotomy
Face / innervation*
Facial Muscles / physiology*
Facial Nerve / physiology*
Female
Male
Rats
Sucking Behavior / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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